I decided to use IF This Then That (http://www.ifttt.com) so that I can monitor my tweets that include @waze (as is done when Waze publishes the traffic notification).

https://ifttt.com/recipes/82958

when it detects a tweet containing @waze, tweets a copy and appends the hashtag I use locally.

Feel free to set it up and use it for yourselves...

BTW:
If This Then That is an awesome cross-posting utility.